Group Update Provider (GUP)

What are the New Features, Changes in group update provider (GUP) from version 11.0.5 to 12.1 RU1 MP1?

Can someone please provide the link to the documentation on this? I was unable to find any link on the latest version of GUP, all I found was documents on best practices, troubleshooting and also videos from older version (11.0.5).

The Release notes are your best source for these kinds of things. Article 163829 has a link for every version. I have never seen an article solely focussing on the GUP functionality, thus you will have to read the complete article per version to pick out the GUP improvements.

Please mark the post that best solves your problem as the answer to this thread.